Translation of "firstborn" into Estonian

I had no doubt that he was my firstborn.

Mul ei olnud kahtlustki, et tema on mu esiklaps.

But if you refuse to send him away, I am going to kill your son, your firstborn.”’”

Aga kui sa keeldud, siis tapan ma sinu poja, su esmasündinu.”””

But something was wrong, simply because no one expected that firstborn son to be a daughter.

Kuid miski oli valesti, kuna keegi ei osanud oodata, et esmasündinud poja asemel sünnib tütar.